Animal Diversity

Question 1

Arrange the following traits in order from most ancestral to most derived in animals.

I. True Coelom
II. Bilateral symmetry
III. Multicellularity / ECM
IV. Specialized tissues

Answer 1

III , IV , II , I

Question 2

What is/are TRUE about Coelem?

a) Mass of mesoderm formed between the Ectoderm & Endoderm
b) Fluid-filled space between germ layers
c) Component in FLAT organisms
d) Pseudocoelomates coelom is between the Ectoderm and Mesoderm

Answer 2

b

Question 3

When does the Mesoderm in Animals form?

a) Before Zygote formation
b) Right after Zygote formation
c) During Gastrulation
d) Blastula formation comes second

Answer 3

c